Plants and seeds of spring canola variety SCV942568

ABSTRACT

In an embodiment, the invention relates to the seeds, plants, and plant parts of canola line SCV942568 and to methods for producing a canola plant produced by crossing canola line SCV942568 with itself or with another canola line. The invention also relates to methods for producing a canola plant containing in its genetic material one or more transgenes and to the transgenic canola plants and plant parts produced by those methods. This invention also relates to canola lines or breeding lines and plant parts derived from canola line SCV942568, to methods for producing other canola lines, lines or plant parts derived from canola line SCV942568 and to the canola plants, varieties, and their parts derived from use of those methods. The invention further relates to hybrid canola seeds, plants and plant parts produced by crossing the line SCV942568 with another canola line.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a new and distinctive canola line,designated SCV942568. All publications cited in this application areherein incorporated by reference.

2. Description of Related Art

Canola, Brassica napus oleifera annua, is an important and valuablefield crop. Thus, a continuing goal of canola plant breeders is todevelop stable, high yielding canola lines that are agronomically sound.The reasons for this goal are obviously to maximize the amount of grainproduced on the land used and to supply food for both animals andhumans. The high quality vegetable oil extracted from canola grain is aprimary reason for canola's commercial value. Thus, in addition tobreeding varieties that offer high grain yields, canola plant breedersalso focus on increasing the oil content level in the grain in order tomaximize total oil yield per acre. To accomplish these goals, the canolabreeder must select and develop canola plants that have the traits thatresult in superior lines.

SUMMARY OF THE INVENTION

Reference now will be made in detail to the embodiments of theinvention, one or more examples of which are set forth below. Eachexample is provided by way of explanation of the invention, not alimitation of the invention. In fact, it will be apparent to thoseskilled in the art that various modifications and variations can be madein the present invention without departing from the scope or spirit ofthe invention. For instance, features illustrated or described as partof one embodiment, can be used on another embodiment to yield a stillfurther embodiment.

Thus, it is intended that the present invention covers suchmodifications and variations as come within the scope of the appendedclaims and their equivalents. Other objects, features and aspects of thepresent invention are disclosed in or are obvious from the followingdetailed description. It is to be understood by one of ordinary skill inthe art that the present discussion is a description of exemplaryembodiments only, and is not intended as limiting the broader aspects ofthe present invention.

According to the invention, there is provided a new canola linedesignated SCV942568. This invention thus relates to the seeds, plants,and/or plant parts of canola of canola line SCV942568 and to methods forproducing a canola plant produced by crossing the canola SCV942568 withitself or another canola genotype, and the creation of variants bymutagenesis or transformation of canola SCV942568.

Thus, any methods using the canola line SCV942568 are part of thisinvention: selfing, backcrosses, hybrid production, crosses topopulations, and the like. All plants produced using canola lineSCV942568 as a parent are within the scope of this invention.Advantageously, the canola line could be used in crosses with other,different, canola plants to produce first generation (F₁) canola hybridseeds and plants with superior characteristics.

In another aspect, the present invention provides for single or multiplegene converted plants of SCV942568. The transferred gene(s) maypreferably be a dominant or recessive allele. Preferably, thetransferred gene(s) will confer such traits as herbicide resistance,insect resistance, resistance for bacterial, fungal, or viral disease,male fertility, male sterility, enhanced nutritional quality, modifiedfatty acid metabolism, modified carbohydrate metabolism, modified seedyield, modified oil percent, modified protein percent, modified lodgingresistance, modified glucosinolate content, modified chlorophyll contentand industrial usage. The gene may be a naturally occurring canola geneor a transgene introduced through genetic engineering techniques.

In another aspect, the present invention provides regenerable cells foruse in tissue culture of canola plant SCV942568. The tissue culture willpreferably be capable of regenerating plants having essentially all ofthe physiological and morphological characteristics of the foregoingcanola plant, and of regenerating plants having substantially the samegenotype as the foregoing canola plant. Preferably, the regenerablecells in such tissue cultures will be embryos, protoplasts, meristematiccells, callus, pollen, leaves, anthers, pistils, cotyledons, roots, roottips, flowers, seeds, pods or stems. Still further, the presentinvention provides canola plants regenerated from the tissue cultures ofthe invention.

In another aspect, the present invention provides a method ofintroducing a desired trait into canola line SCV942568 wherein themethod comprises: (1) crossing a SCV942568 plant with a plant of anothercanola genotype that comprises a desired trait to produce F₁ progenyplants, wherein the desired trait is selected from the group consistingof male sterility, herbicide resistance, insect resistance, modifiedfatty acid metabolism, modified carbohydrate metabolism, modified seedyield, modified oil percent, modified protein percent, modified lodgingresistance and resistance to bacterial disease, fungal disease or viraldisease; (2) selecting one or more progeny plants that have the desiredtrait to produce selected progeny plants; (3) crossing the selectedprogeny plants with the SCV942568 plants to produce backcross progenyplants; (4) selecting for backcross progeny plants that have the desiredtrait and essentially all of the physiological and morphologicalcharacteristics of canola line SCV942568 to produce selected backcrossprogeny plants; and (5) repeating these steps three or more times toproduce selected fourth or higher backcross progeny plants that comprisethe desired trait and essentially all of the physiological andmorphological characteristics of canola line SCV942568 as listed inTable 1. Included in this aspect of the invention is the plant producedby the method wherein the plant has the desired trait and essentiallyall of the physiological and morphological characteristics of canolaline SCV942568 as listed in Table 1.

Definitions

In the description and tables which follow, a number of terms are used.In order to provide a clear and consistent understanding of thespecification and claims, including the scope to be given such terms,the following definitions are provided:

-   Allele. Allele is any of one or more alternative forms of a gene    which relate to one trait or characteristic. In a diploid cell or    organism, the two alleles of a given gene occupy corresponding loci    on a pair of homologous chromosomes.-   Alter. The utilization of up-regulation, down-regulation, or gene    silencing.-   Anther arrangement. The orientation of the anthers in fully opened    flowers can also be useful as an identifying trait. This can range    from introse (facing inward toward pistil), erect (neither inward    not outward), or extrose (facing outward away from pistil).-   Anther dotting. The presence/absence of anther dotting (colored    spots on the tips of anthers) and if present, the percentage of    anther dotting on the tips of anthers in newly opened flowers is    also a distinguishing trait for varieties.-   Anther fertility. This is a measure of the amount of pollen produced    on the anthers of a flower. It can range from sterile (such as in    female parents used for hybrid seed production) to fertile (all    anthers shedding).-   Backcrossing. Backcrossing is a process in which a breeder    repeatedly crosses hybrid progeny back to one of the parents, for    example, a first generation hybrid F₁ with one of the parental    genotypes of the F₁ hybrid.-   Blackleg (Leptosphaeria maculans). Virulent or severe blackleg of    canola/rapeseed is a fungal canker or dry rot disease of the    actively growing crop that causes stem girdling and lodging. In    heavily infested crops, up to 100 percent of the stems may be    infected, resulting in major yield loss. For purposes of this    application, resistance to blackleg is measured using ratings of “R”    (resistant), “MR” (medium resistant), “MS” (moderately susceptible)    or “S” (susceptible).-   Cell. Cell as used herein includes a plant cell, whether isolated,    in tissue culture or incorporated in a plant or plant part.-   Cotyledon width. The cotyledons are leaf structures that form in the    developing seeds of canola which make up the majority of the mature    seed of these species. When the seed germinates, the cotyledons are    pushed out of the soil by the growing hypocotyls (segment of the    seedling stem below the cotyledons and above the root) and they    unfold as the first photosynthetic leafs of the plant. The width of    the cotyledons varies by variety and can be classified as narrow,    medium, or wide.-   Early vigor. This is a measure of a canola seed's ability to    germinate and emerge after planting. A score of 1 indicates poor    early vigor. A score of 5 indicates excellent early vigor. The early    vigor rating is taken at four weeks after planting.-   Elite canola line. A canola line, per se, which has been sold    commercially.-   Elite canola parent line. A canola line which is the parent line of    a canola hybrid which has been commercially sold.-   Embryo. The embryo is the small plant contained within a mature    seed.

Essentially all of the physiological and morphological characteristics.“Essentially all of the physiological and morphological characteristics”refers to a plant having essentially all of the physiological andmorphological characteristics of the recurrent parent, except for thecharacteristics derived from the converted trait.

-   FAME analysis. Fatty Acid Methyl Ester analysis is a method that    allows for accurate quantification of the fatty acids that make up    complex lipid classes.-   Flower bud location. The location of the unopened flower buds    relative to the adjacent opened flowers is useful in distinguishing    between the canola species. The unopened buds are held above the    most recently opened flowers in B. napus and they are positioned    below the most recently opened flower buds in B. rapa.-   Flowering date. This is measured by the number of days from planting    to the stage when 50% of the plants in a population have one or more    open flowers. This varies from variety to variety.-   Fusarium Wilt. Fusarium wilt, largely caused by Fusarium oxysporum,    is a disease of canola that causes part or all of a plant to wilt,    reducing yield by up to 30% or more on badly affected fields. For    purposes of this application, resistance to Fusarium wilt is    measured using ratings of “R” (resistant), “MR” (medium resistant),    “MS” (moderately susceptible) or “S” (susceptible).-   Gene silencing. Gene silencing means the interruption or suppression    of the expression of a gene at the level of transcription or    translation.-   Genotype. Refers to the genetic constitution of a cell or organism.-   Glucosinolates. These are measured in micromoles (μm) of total    alipathic glucosinolates per gram of air-dried oil-free meal. The    level of glucosinolates is somewhat influenced by the sulfur    fertility of the soil, but is also controlled by the genetic makeup    of each variety and thus can be useful in characterizing varieties.-   Growth habit. At the end of flowering, the angle relative to the    ground surface of the outermost fully expanded leaf petioles is a    variety specific trait. This trait can range from erect (very    upright along the stem) to prostrate (almost horizontal and parallel    with the ground surface).-   Leaf attachment to the stem. This trait is especially useful for    distinguishing between the two canola species. The base of the leaf    blade of the upper stem leaves of B. rapa completely clasp the stem    whereas those of the B. napus only partially clasp the stem. Those    of the mustard species do not clasp the stem at all.-   Leaf blade color. The color of the leaf blades is variety specific    and can range from light to medium dark green to blue green.-   Leaf development of lobes. The leaves on the upper portion of the    stem can show varying degrees of development of lobes which are    disconnected from one another along the petiole of the leaf The    degree of lobing is variety specific and can range from absent (no    lobes)/weak through very strong (abundant lobes).-   Leaf glaucosity. This refers to the waxiness of the leaves and is    characteristic of specific varieties although environment can have    some effect on the degree of waxiness. This trait can range from    absent (no waxiness)/weak through very strong. The degree of    waxiness can be best determined by rubbing the leaf surface and    noting the degree of wax present.-   Leaf indentation of margin. The leaves on the upper portion of the    stem can also show varying degrees of serration along the leaf    margins. The degree of serration or indentation of the leaf margins    can vary from absent (smooth margin)/weak to strong (heavy saw-tooth    like margin).-   Leaf pubescence. The leaf pubescence is the degree of hairiness of    the leaf surface and is especially useful for distinguishing between    the canola species. There are two main classes of pubescence which    are glabrous (smooth/not hairy) and pubescent (hairy) which mainly    differentiate between the B. napus and B. rapa species,    respectively.-   Leaf surface. The leaf surface can also be used to distinguish    between varieties. The surface can be smooth or rugose (lumpy) with    varying degrees between the two extremes.-   Linkage. Refers to a phenomenon wherein alleles on the same    chromosome tend to segregate together more often than expected by    chance if their transmission was independent.-   Linkage disequilibrium. Refers to a phenomenon wherein alleles tend    to remain together in linkage groups when segregating from parents    to offspring, with a greater frequency than expected from their    individual frequencies.-   Locus. A locus confers one or more traits such as, for example, male    sterility, herbicide tolerance, insect resistance, disease    resistance, modified fatty acid metabolism, modified phytic acid    metabolism, modified carbohydrate metabolism and modified protein    metabolism. The trait may be, for example, conferred by a naturally    occurring gene introduced into the genome of the variety by    backcrossing, a natural or induced mutation, or a transgene    introduced through genetic transformation techniques. A locus may    comprise one or more alleles integrated at a single chromosomal    location.-   Lodging resistance. Lodging is rated on a scale of 0 to 5. A score    of 0 indicates plants are lying on the ground (lodged). A score of 5    indicates plants are standing vertical (not lodged).-   Maturity. The maturity of a variety is measured as the number of    days between planting and physiological maturity. This is useful    trait in distinguishing varieties relative to one another.-   Oil content. This is measured as percent of the whole dried seed and    is characteristic of different varieties. It can be determined using    various analytical techniques such as NMR, NIR, and Soxhlet    extraction.-   Open pollination. As used herein, the term open pollination means    the natural, uncontrolled pollination, such as by insects, birds,    wind, or other natural mechanisms, that occurs within a    cross-pollinated or self-pollinated population or variety.-   Percent linolenic acid. Percent oil of the seed that is linolenic    acid.-   Percent oleic acid (OLE). Percent oil of the seed that is oleic    acid.-   Percentage of total fatty acids. This is determined by extracting a    sample of oil from seed, producing the methyl esters of fatty acids    present in that oil sample and analyzing the proportions of the    various fatty acids in the sample using gas chromatography. The    fatty acid composition can also be a distinguishing characteristic    of a variety.-   Petal color. The petal color on the first day a flower opens can be    a distinguishing characteristic for a variety. It can be white,    varying shades of yellow or orange.-   Plant. As used herein, the term “plant” includes reference to an    immature or mature whole plant, including a plant from which seed or    grain or anthers have been removed. Seed or embryo that will produce    the plant is also considered to be the plant.-   Plant height. This is the height of the plant at the end of    flowering if the floral branches are extended upright (i.e., not    lodged). This varies from variety to variety and although it can be    influenced by environment, relative comparisons between varieties    grown side by side are useful for variety identification.-   Plant parts. As used herein, the term “plant parts” (or a canola    plant, or a part thereof) includes protoplasts, leaves, stems,    roots, root tips, anthers, pistils, seed, grain, embryo, pollen,    ovules, cotyledon, hypocotyl, pod, flower, shoot, tissue, petiole,    cells, meristematic cells and the like.-   Protein content. This is measured as percent of whole dried seed and    is characteristic of different varieties. This can be determined    using various analytical techniques such as NIR and Kjeldahl.-   Quantitative trait loci (QTL). Quantitative trait loci (QTL) refer    to genetic loci that control to some degree numerically    representable traits that are usually continuously distributed.-   Regeneration. Regeneration refers to the development of a plant from    tissue culture.-   Resistance to lodging. This measures the ability of a variety to    stand up in the field under high yield conditions and severe    environmental factors. A variety can have good (remains upright),    fair, or poor (falls over) resistance to lodging. The degree of    resistance to lodging is not expressed under all conditions but is    most meaningful when there is some degree of lodging in a field    trial.-   Seed coat color. The color of the seed coat can be variety specific    and can range from black through brown through yellow. Color can    also be mixed for some varieties.

Seed coat mucilage. This is useful for differentiating between the twospecies of canola with B. rapa varieties having mucilage present intheir seed coats whereas B. napus varieties do not have this present. Itis detected by imbibing seeds with water and monitoring the mucilagethat is exuded by the seed.

-   Seedling growth habit. The rosette consists of the first 2-8 true    leaves and a variety can be characterized as having a strong rosette    (closely packed leaves) or a weak rosette (loosely arranged leaves).-   Silique (pod) habit. This is also a trait which is variety specific    and is a measure of the orientation of the pods along the racemes    (flowering stems). This trait can range from erect (pods angled    close to racemes) through horizontal (pods perpendicular to racemes)    through arching (pods show distinct arching habit).-   Silique (pod) length of beak. The beak is the segment at the end of    the pod which does not contain seed (it is a remnant of the stigma    and style for the flower). The length of the beak can be variety    specific and can range form short through medium through long.-   Silique (pod) length of pedicel. The pedicel is the stem that    attaches the pod to the raceme of flowering shoot. The length of the    pedicel can be variety specific and can vary from short through    medium through long.-   Silique (pod) length. This is the length of the fully developed pods    and can range from short to medium to long. It is best used by    making comparisons relative to reference varieties.-   Silique (pod) type. This is typically a bilateral single pod for    both species of canola and is not really useful for variety    identification within these species.-   Silique (pod) width. This is the width of the fully developed pods    and can range from narrow to medium to wide. It is best used by    making comparisons relative to reference varieties.-   Single gene converted (conversion). Single gene converted    (conversion) plant refers to plants which are developed by a plant    breeding technique called backcrossing, or via genetic engineering,    wherein essentially all of the desired morphological and    physiological characteristics of a variety are recovered in addition    to the single gene transferred into the variety via the backcrossing    technique or via genetic engineering.-   Stem intensity of anthocyanin coloration. The stems and other organs    of canola plants can have varying degrees of purple coloration which    is due to the presence of anthocyanin (purple) pigments. The degree    of coloration is somewhat subject to growing conditions, but    varieties typically show varying degrees of coloration ranging from:    absent (no purple)/very weak to very strong (deep purple    coloration).-   Total saturated (TOTSAT). Total percent oil of the seed of the    saturated fats in the oil including C12:0, C14:0, C16:0, C18:0,    C20:0, C22:0 and C24.0.

DETAILED DESCRIPTION OF THE INVENTION

Spring canola variety SCV942568 is a Roundup Ready™ (RT73 transgene)INRA Ogura cytoplasmic male sterile line (commonly referred to as the“A-Line”) used in making spring canola hybrids. It is maintained by thegenetic line SCV505265 (referred to as the “B-Line”). Both weredeveloped from the cross of SCV275625 and SCV431322 (proprietary springcanola inbred lines of Monsanto Technology LLC). A progeny selected fromthis cross was self-pollinated and the pedigree system of plant breedingwas then used to develop SCV505265 which is an F 10 level selection. Atthe F4 generation, the B line was crossed onto a SCV431322 A line plant(acting as a source of the Ogura cytoplasm). Every subsequent generationof B line selfing, it was also backcrossed into the Ogura cytoplasmuntil selection at the MSC6 generation. Some of the criteria used forselection in various generations include: standability, diseasetolerance, high combining ability, moderate oil content and moderatetotal saturated fats.

Canola line SCV942568 is stable and uniform and no off-type plants havebeen exhibited in evaluation. The line has shown uniformity andstability, as described in the following variety descriptioninformation. It has been self-pollinated a sufficient number ofgenerations with careful attention to uniformity of plant type. The linehas been increased with continued observation for uniformity.

Canola line SCV942568 has the following morphological and othercharacteristics.

TABLE 1 VARIETY DESCRIPTION INFORMATION No. of Environments SCV942568SCV816796 SCV431322 Measured Plant Characteristics Days to 50% Flowering49 50.5 48 2 Maturity 94.5 94.5 94.5 2 Plant Height (cm) 105 87.5 92.5 2Lodging Resistance (rating) 5 5 5 2 Early Vigor (rating) 5 4 5 2Herbicide Resistance RT73 glyphosate RT73 glyphosate RT73 glyphosate 2Disease Resistance Blackleg MR MR MR 3 Fusarium wilt R R R 2 SeedCharacteristics Seed Coat Color Black Black Black 2 Seed Weight 3.5 3.53.9 1 (g/1,000 seeds) % Oil Content 46.45 49.48 45.26 2 % ProteinContent 49.26 50.13 46.94 2 (as a % of the oil-free meal) Erucic AcidContent Low (<2%) Low (<2%) Low (<2%) 2 Glucosinolate Content 13.02 9.3414.21 2 (micromoles/gram defatted meal) Canola line SCV942568 is not aparent of any other canola line commercialized at the time of the patentfiling for SCV942568.

This invention is also directed to methods for producing a canola plantby crossing a first parent canola plant with a second parent canolaplant, wherein the first or second canola plant is the canola plant fromthe line SCV942568. Further, both first and second parent canola plantsmay be from the line SCV942568. Therefore, any methods using the lineSCV942568 are part of this invention: selfing, backcrosses, hybridbreeding, and crosses to populations. Any plants produced using lineSCV942568 as a parent are within the scope of this invention.

Additional methods include, but are not limited to, expression vectorsintroduced into plant tissues using a direct gene transfer method suchas microprojectile-mediated delivery, DNA injection, electroporation,and the like. More preferably, expression vectors may be introduced intoplant tissues by using either microprojectile-mediated delivery with aballistic device or by using Agrobacterium-mediated transformation.Transformant plants obtained with the protoplasm of the invention areintended to be within the scope of this invention.

The advent of new molecular biological techniques has allowed theisolation and characterization of genetic elements with specificfunctions, such as encoding specific protein products. Scientists in thefield of plant biology developed a strong interest in engineering thegenome of plants to contain and express foreign genetic elements, oradditional, or modified versions of native or endogenous geneticelements in order to alter the traits of a plant in a specific manner.Any DNA sequences, whether from a different species or from the samespecies which are inserted into the genome using transformation, arereferred to herein collectively as “transgenes.” In some embodiments ofthe invention, a transgenic variant of SCV942568 may contain at leastone transgene but could contain at least 1, 2, 3, 4, 5, 6, 7, 8, 9, 10and/or no more than 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, or 2.Over the last fifteen to twenty years, several methods for producingtransgenic plants have been developed, and the present invention alsorelates to transgenic variants of the claimed canola line SCV942568.

One embodiment of the invention is a process for producing canola lineSCV942568 further comprising a desired trait, said process comprisingtransforming a canola plant of line SCV942568 with a transgene thatconfers a desired trait. Another embodiment is the product produced bythis process. In one embodiment the desired trait may be one or more ofherbicide resistance, insect resistance, disease resistance, modifiedseed yield, modified oil percent, modified protein percent, modifiedlodging resistance or modified fatty acid or carbohydrate metabolism.The specific gene may be any known in the art or listed herein,including; a polynucleotide conferring resistance to imidazolinone,sulfonylurea, glyphosate, glufosinate, triazine, hydroxyphenylpyruvatedioxygenase inhibitor, protoporphyrinogen oxidase inhibitor andbenzonitrile; a polynucleotide encoding a Bacillus thuringiensispolypeptide, a polynucleotide encoding phytase, FAD-2, FAD-3, galactinolsynthase or a raffinose synthetic enzyme; or a polynucleotide conferringresistance to blackleg, white rust or other common canola diseases.

Numerous methods for plant transformation have been developed, includingbiological and physical plant transformation protocols, all of which maybe used with this invention. In addition, expression vectors and invitro culture methods for plant cell or tissue transformation andregeneration of plants are available and may be used in conjunction withthe invention.

In an embodiment, a genetic trait which has been engineered into thegenome of a particular canola plant may be moved into the genome ofanother variety using traditional breeding techniques that are wellknown in the plant breeding arts. For example, a backcrossing approachmay be used to move a transgene from a transformed canola variety intoan already developed canola variety, and the resulting backcrossconversion plant would then comprise the transgene(s).

In embodiments, various genetic elements can be introduced into theplant genome using transformation. These elements include any known inthe art, specifically including, but not limited to genes, codingsequences, inducible, constitutive, and tissue specific promoters,enhancing sequences, and signal and targeting sequences.

Plant transformation involves the construction of an expression vectorwhich will function in plant cells. Such a vector comprises DNAcomprising a gene under control of or operatively linked to a regulatoryelement (for example, a promoter). The expression vector may contain oneor more of such operably linked gene/regulatory element combinations.The vector(s) may be in the form of a plasmid, and can be used alone orin combination with other plasmids, to provide transformed canolaplants, using transformation methods as described below to incorporatetransgenes into the genetic material of the canola plant(s).

Expression Vectors for Canola Transformation: Marker Genes

Expression vectors include at least one genetic marker operably linkedto a regulatory element (a promoter, for example) that allowstransformed cells containing the marker to be either recovered bynegative selection, i.e., inhibiting growth of cells that do not containthe selectable marker gene, or by positive selection, i.e., screeningfor the product encoded by the genetic marker. Many commonly usedselectable marker genes for plant transformation are well known in thetransformation arts, and include, for example, genes that code forenzymes that metabolically detoxify a selective chemical agent which maybe an antibiotic or an herbicide, or genes that encode an altered targetwhich is insensitive to the inhibitor. A few positive selection methodsare also known in the art.

One commonly used selectable marker gene for plant transformation is theneomycin phosphotransferase II (nptII) gene which, when under thecontrol of plant regulatory signals, confers resistance to kanamycin.Another commonly used selectable marker gene is the hygromycinphosphotransferase gene which confers resistance to the antibiotichygromycin.

Additional selectable marker genes of bacterial origin that conferresistance to antibiotics include gentamycin acetyl transferase,streptomycin phosphotransferase, aminoglycoside-3′-adenyl transferaseand the bleomycin resistance determinant. Other selectable marker genesconfer resistance to herbicides such as glyphosate, glufosinate orbromoxynil. Selectable marker genes for plant transformation not ofbacterial origin include, for example, mouse dihydrofolate reductase,plant 5-enolpyruvylshikimate-3-phosphate synthase and plant acetolactatesynthase.

Another class of marker genes for plant transformation requiresscreening of presumptively transformed plant cells rather than directgenetic selection of transformed cells for resistance to a toxicsubstance such as an antibiotic. These genes are particularly useful toquantify or visualize the spatial pattern of expression of a gene inspecific tissues and are frequently referred to as reporter genesbecause they can be fused to a gene or gene regulatory sequence for theinvestigation of gene expression. Commonly used genes for screeningpresumptively transformed cells include β-glucuronidase (GUS),β-galactosidase, luciferase and chloramphenicol acetyltransferase. Anyof the above, or other marker genes, may be utilized in the presentinvention.

In vivo methods for visualizing GUS activity that do not requiredestruction of plant tissue are available and can be used in embodimentsof the invention. Additionally, Green Fluorescent Protein (GFP) can beutilized as a marker for gene expression in prokaryotic and eukaryoticcells. GFP and mutants of GFP may be used as screenable markers.

Expression Vectors for Canola Transformation: Promoters

Genes included in expression vectors must be driven by a nucleotidesequence comprising a regulatory element, for example, a promoter.Several types of promoters are well known in the transformation arts, asare other regulatory elements that can be used alone or in combinationwith promoters.

As used herein, “promoter” includes reference to a region of DNAupstream from the start of transcription and involved in recognition andbinding of RNA polymerase and other proteins to initiate transcription.A “plant promoter” is a promoter capable of initiating transcription inplant cells. Examples of promoters under developmental control includepromoters that preferentially initiate transcription in certain tissues,such as leaves, roots, seeds, fibers, xylem vessels, tracheids, orsclerenchyma. Such promoters are referred to as “tissue-preferred”.Promoters which initiate transcription only in certain tissues arereferred to as “tissue-specific”. A “cell type” specific promoterprimarily drives expression in certain cell types in one or more organs,for example, vascular cells in roots or leaves. An “inducible” promoteris a promoter which is under environmental control. Examples ofenvironmental conditions that may effect transcription by induciblepromoters include anaerobic conditions or the presence of light.Tissue-specific, tissue-preferred, cell type specific, and induciblepromoters constitute the class of “non-constitutive” promoters. A“constitutive” promoter is a promoter which is active under mostenvironmental conditions.

A. Inducible Promoters—An inducible promoter is operably linked to agene for expression in canola. Optionally, the inducible promoter isoperably linked to a nucleotide sequence encoding a signal sequencewhich is operably linked to a gene for expression in canola. With aninducible promoter the rate of transcription increases in response to aninducing agent.

Any inducible promoter can be used in the instant invention. Exemplaryinducible promoters include, but are not limited to, those from the ACEIsystem which respond to copper, the In2 gene from maize which respondsto benzenesulfonamide herbicide safeners, or the Tet repressor fromTn10. A particularly preferred inducible promoter is a promoter thatresponds to an inducing agent to which plants do not normally respond.An exemplary inducible promoter is the inducible promoter from a steroidhormone gene, the transcriptional activity of which is induced by aglucocorticosteroid hormone.

B. Constitutive Promoters—A constitutive promoter is operably linked toa gene for expression in canola or the constitutive promoter is operablylinked to a nucleotide sequence encoding a signal sequence which isoperably linked to a gene for expression in canola.

Many different constitutive promoters can be utilized in the instantinvention. Exemplary constitutive promoters include, but are not limitedto, the promoters from plant viruses such as the 35S promoter from CaMVand the promoters from such genes as rice actin, ubiquitin, pEMU, MAS,and maize H3 histone. The ALS promoter, XbaI/NcoI fragment 5′ to theBrassica napus ALS3 structural gene (or a nucleotide sequence similarityto said XbaI/NcoI fragment) could also be utilized herein.

C. Tissue-specific or Tissue-preferred Promoters—A tissue-specificpromoter is operably linked to a gene for expression in canola.Optionally, the tissue-specific promoter is operably linked to anucleotide sequence encoding a signal sequence which is operably linkedto a gene for expression in canola. Plants transformed with a gene ofinterest operably linked to a tissue-specific promoter produce theprotein product of the transgene exclusively, or preferentially, in aspecific tissue.

Any tissue-specific or tissue-preferred promoter can be utilized in theinstant invention. Exemplary tissue-specific or tissue-preferredpromoters include, but are not limited to, a root-preferred promotersuch as that from the phaseolin gene, a leaf-specific and light-inducedpromoter such as that from cab or rubisco, an anther-specific promotersuch as that from LAT52, a pollen-specific promoter such as that fromZm13, or a microspore-preferred promoter such as that from apg.

Signal Sequences for Targeting Proteins to Subcellular Compartments

Transport of protein produced by transgenes to a subcellular compartmentsuch as the chloroplast, vacuole, peroxisome, glyoxysome, cell wall ormitochondrion or for secretion into the apoplast, is accomplished bymeans of operably linking the nucleotide sequence encoding a signalsequence to the 5′ and/or 3′ region of a gene encoding the protein ofinterest. Targeting sequences at the 5′ and/or 3′ end of the structuralgene may determine, during protein synthesis and processing, where theencoded protein is ultimately compartmentalized. The presence of asignal sequence directs a polypeptide to either an intracellularorganelle or subcellular compartment or for secretion to the apoplast.Many signal sequences are known in the art and can be utilized in thepresent invention.

Foreign Protein Genes and Agronomic Genes

With transgenic plants according to the present invention, a foreignprotein can be produced in commercial quantities. Thus, techniques forthe selection and propagation of transformed plants, which are wellunderstood in the art, are within the scope of the invention. In anembodiment, a foreign protein then can be extracted from a tissue ofinterest or from the total biomass by known methods.

According to a preferred embodiment, the transgenic plant provided forcommercial production of foreign protein is a canola plant. In anotherpreferred embodiment, the biomass of interest is seed. For therelatively small number of transgenic plants that show higher levels ofexpression, a genetic map can be generated, primarily via conventionalRFLP, PCR and SSR analysis, which identifies the approximate chromosomallocation of the integrated DNA molecule. Map information concerningchromosomal location is useful for proprietary protection of a subjecttransgenic plant. If unauthorized propagation is undertaken and crossesare made with other germplasm, the map of the integration region can becompared to similar maps for suspect plants, to determine if the latterhave a common parentage with the subject plant. Map comparisons wouldinvolve hybridizations, RFLP, PCR, SSR and sequencing, all of which areconventional techniques. SNPs may also be used alone or in combinationwith other techniques.

Likewise, by means of the present invention, plants can be geneticallyengineered to express various phenotypes of agronomic interest. Throughthe transformation of canola, the expression of genes can be altered toenhance disease resistance, insect resistance, herbicide resistance,agronomic, grain quality and other traits. Transformation can also beused to insert DNA sequences which control, or help control,male-sterility. DNA sequences native to canola, as well as non-nativeDNA sequences, can be transformed into canola and used to alter levelsof native or non-native proteins. Various promoters, targetingsequences, enhancing sequences, and other DNA sequences can be insertedinto the genome for the purpose of altering the expression of proteins.Reduction of the activity of specific genes (also known as genesilencing, or gene suppression) is desirable for several aspects ofgenetic engineering in plants.

Many techniques for gene silencing are well known to one of skill in theart, including but not limited to knock-outs (such as by insertion of atransposable element such as Mu or other genetic elements such as a FRT,Lox or other site specific integration site), antisense technology,co-suppression, RNA interference, virus-induced gene silencing,target-RNA-specific ribozymes, hairpin structures, MicroRNA, ribozymes,oligonucleotide-mediated targeted modification, Zn-finger targetedmolecules, and other methods or combinations of the above methods knownto those of skill in the art.

Likewise, by means of the present invention, agronomic genes can beexpressed in transformed plants. More particularly, plants can begenetically engineered to express various phenotypes of agronomicinterest. Exemplary genes implicated in this regard include, but are notlimited to, those categorized below:

1. Genes That Confer Resistance to Pests or Disease and That Encode:

-   A. Plant disease resistance genes. Plant defences are often    activated by specific interaction between the product of a disease    resistance gene (R) in the plant and the product of a corresponding    avirulence (Avr) gene in the pathogen. A plant variety can be    transformed with cloned resistance genes to engineer plants that are    resistant to specific pathogen strains.-   B. A gene conferring resistance to fungal pathogens, such as oxalate    oxidase or oxalate decarboxylase.-   C. A Bacillus thuringiensis protein, a derivative thereof, or a    synthetic polypeptide modeled thereon, for example, a Bt δ-endotoxin    gene.-   D. A lectin.-   E. A vitamin-binding protein such as avidin or a homolog.-   F. An enzyme inhibitor, for example, a protease or proteinase    inhibitor or an amylase inhibitor.-   G. An insect-specific hormone or pheromone such as an ecdysteroid or    juvenile hormone, a variant thereof, a mimetic based thereon, or an    antagonist or agonist thereof.-   H. An insect-specific peptide or neuropeptide which, upon    expression, disrupts the physiology of the affected pest.-   I. An insect-specific venom produced in nature by a snake, a wasp,    etc.-   J. An enzyme responsible for a hyperaccumulation of a monoterpene, a    sesquiterpene, a steroid, hydroxamic acid, a phenylpropanoid    derivative or another non-protein molecule with insecticidal    activity.-   K. An enzyme involved in the modification, including the    post-translational modification, of a biologically active molecule;    for example, a glycolytic enzyme, a proteolytic enzyme, a lipolytic    enzyme, a nuclease, a cyclase, a transaminase, an esterase, a    hydrolase, a phosphatase, a kinase, a phosphorylase, a polymerase,    an elastase, a chitinase and a glucanase, whether natural or    synthetic.-   L. A molecule that stimulates signal transduction.-   M. A hydrophobic moment peptide.-   N. A membrane permease, a channel former or a channel blocker.-   O. A viral-invasive protein or a complex toxin derived therefrom.    For example, the accumulation of viral coat proteins in transformed    plant cells imparts resistance to viral infection and/or disease    development effected by the virus from which the coat protein gene    is derived, as well as by related viruses. Coat protein-mediated    resistance has been conferred upon transformed plants against    alfalfa mosaic virus, cucumber mosaic virus, tobacco streak virus,    potato virus X, potato virus Y, tobacco etch virus, tobacco rattle    virus and tobacco mosaic virus.-   P. An insect-specific antibody or an immunotoxin derived therefrom.    An antibody targeted to a critical metabolic function in the insect    gut would inactivate an affected enzyme, killing the insect.-   Q. A virus-specific antibody.-   R. A developmental-arrestive protein produced in nature by a    pathogen or a parasite. Thus, fungal endo-α-1,4-D-polygalacturonases    facilitate fungal colonization and plant nutrient release by    solubilizing plant cell wall homo-α-1,4-D-galacturonase.-   S. A developmental-arrestive protein produced in nature by a plant.-   T. Genes involved in the Systemic Acquired Resistance (SAR) Response    and/or the pathogenesis-related genes.-   U. Antifungal genes.-   V. Detoxification genes, such as for fumonisin, beauvericin,    moniliformin and zearalenone and their structurally related    derivatives.-   W. Cystatin and cysteine proteinase inhibitors.-   X. Defensin genes.-   Y. Genes that confer resistance to Phytophthora root rot, such as    the Brassica equivalents of the Rps 1, Rps 1-a, Rps 1-b, Rps 1-c,    Rps 1-d, Rps 1-e, Rps 1-k, Rps 2, Rps 3-a, Rps 3-b, Rps 3-c, Rps 4,    Rps 5, Rps 6, Rps 7 and other Rps genes.    2. Genes That Confer Resistance to an Herbicide, for Example:-   A. An herbicide that inhibits the growing point or meristem, such as    an imidazolinone or a sulfonylurea.-   B. Glyphosate (resistance conferred by mutant    5-enolpyruvylshikimate-3-phosphate synthase (EPSP) and aroA genes,    respectively) and other phosphono compounds such as glufosinate    (phosphinothricin acetyl transferase (PAT) and Streptomyces    hygroscopicus PAT bar genes), and pyridinoxy or phenoxy proprionic    acids and cyclohexones (ACCase inhibitor-encoding genes). Glyphosate    resistance is also imparted to plants that express a gene that    encodes a glyphosate oxido-reductase enzyme. In addition glyphosate    resistance can be imparted to plants by the over expression of genes    encoding glyphosate N-acetyltransferase. Nucleotide sequences of    glutamine synthetase genes which confer resistance to herbicides    such as L-phosphinothricin are known and can be used herein. The    nucleotide sequence of a PAT gene is also known and can be used.    Exemplary of genes conferring resistance to phenoxy proprionic acids    and cyclohexones, such as sethoxydim and haloxyfop are the Acc1-S1,    Acc1-S2 and Acc1-S3 genes.-   C. An herbicide that inhibits photosynthesis, such as a triazine    (psbA and gs+ genes) and a benzonitrile (nitrilase gene). The    transformation of Chlamydomonas with plasmids encoding mutant psbA    genes are known and can be used.-   D. Acetohydroxy acid synthase, which has been found to make plants    that express this enzyme resistant to multiple types of herbicides.    Other genes that confer tolerance to herbicides include a gene    encoding a chimeric protein of rat cytochrome P4507A1 and yeast    NADPH-cytochrome P450 oxidoreductase, genes for glutathione    reductase and superoxide dismutase, and genes for various    phosphotransferases.-   E. Protoporphyrinogen oxidase (protox), which is necessary for the    production of chlorophyll. The protox enzyme serves as the target    for a variety of herbicidal compounds. These herbicides also inhibit    growth of all the different species of plants present, causing their    total destruction.    3. Genes That Confer or Contribute to a Value-Added Trait, Such as:-   A. Modified fatty acid metabolism, for example, by transforming a    plant with an antisense gene of stearyl-ACP desaturase to increase    stearic acid content of the plant.-   B. Decreased phytate content. Introduction of a phytase-encoding    gene, such as Aspergillus niger phytase gene, may enhance breakdown    of phytate, adding more free phosphate to the transformed plant.    Alternatively, a gene could be introduced that reduces phytate    content. In maize for example, this could be accomplished by cloning    and then reintroducing DNA associated with the single allele which    is responsible for maize mutants characterized by low levels of    phytic acid.-   C. Modified carbohydrate composition effected, for example, by    transforming plants with a gene coding for an enzyme that alters the    branching pattern of starch, or, a gene altering thioredoxin such as    NTR and/or TRX and/or a gamma zein knock out or mutant such as cs27    or TUSC27 or en27. Any known fatty acid modification genes may also    be used to affect starch content and/or composition through the    interrelationship of the starch and oil pathways.-   D. Elevated oleic acid via FAD-2 gene modification and/or decreased    linolenic acid via FAD-3 gene modification.-   E. Altering conjugated linolenic or linoleic acid content. Altering    LEC1, AGP, Dek1, Superal1, mi1ps, various Ipa genes such as Ipa1,    Ipa3, hpt or hggt.    F. Altered antioxidant content or composition, such as alteration of    tocopherol or tocotrienols. In an embodiment, antioxidant levels may    be manipulated through alteration of a phytl prenyl transferase    (ppt) or through alteration of a homogentisate geranyl geranyl    transferase (hggt).-   G. Altered essential seed amino acids.    4. Genes that Control Male Sterility

There are several methods of conferring genetic male sterility availableand within the scope of the invention. As one example, nuclear malesterility may be accomplished by identifying a gene which is critical tomale fertility, silencing this native gene which is critical to malefertility, removing the native promoter from the essential malefertility gene and replacing it with an inducible promoter, insertingthis genetically engineered gene back into the plant, and thus creatinga plant that is male sterile because the inducible promoter is not “on,”resulting in the male fertility gene not being transcribed. Fertility isrestored by inducing, or turning “on”, the promoter, which in turnallows the gene that confers male fertility to be transcribed. Otherpossible examples include the introduction of a deacetylase gene underthe control of a tapetum-specific promoter and with the application ofthe chemical N-Ac-PPT, the introduction of various stamen-specificpromoters, or the introduction of the barnase and the barstar genes.

5. Genes that create a site for site specific DNA integration.

This may include the introduction of FRT sites that may be used in theFLP/FRT system and/or Lox sites that may be used in the Cre/Loxp system.Other systems that may be used include the Gin recombinase of phage Mu,the Pin recombinase of E. coli, and the R/RS system of the pSRi plasmid.

6. Genes that affect abiotic stress resistance (including but notlimited to flowering, pod and seed development, enhancement of nitrogenutilization efficiency, altered nitrogen responsiveness, droughtresistance or tolerance, cold resistance or tolerance, and saltresistance or tolerance) and increased yield under stress. Genes andtranscription factors that affect plant growth and agronomic traits suchas yield, flowering, plant growth and/or plant structure, can beintroduced or introgressed into plants.Methods for Canola Transformation

Numerous methods for plant transformation have been developed, includingbiological and physical plant transformation protocols. In addition,expression vectors and in vitro culture methods for plant cell or tissuetransformation and regeneration of plants are available.

-   A. Agrobacterium-mediated Transformation—One method for introducing    an expression vector into plants is based on the natural    transformation system of Agrobacterium. A. tumefaciens and A.    rhizogenes are plant pathogenic soil bacteria which genetically    transform plant cells. The Ti and Ri plasmids of A. tumefaciens    and A. rhizogenes, respectively, carry genes responsible for genetic    transformation of the plant. Agrobacterium vector systems and    methods for Agrobacterium-mediated gene transfer can be used in the    present invention.-   B. Direct Gene Transfer—Several methods of plant transformation,    collectively referred to as direct gene transfer, have been    developed as an alternative to Agrobacterium-mediated    transformation. A generally applicable method of plant    transformation is microprojectile-mediated transformation wherein    DNA is carried on the surface of microprojectiles measuring 1 to 4    μm. The expression vector is introduced into plant tissues with a    ballistic device that accelerates the microprojectiles to speeds of    300 to 600 m/s which is sufficient to penetrate plant cell walls and    membranes. Another method for physical delivery of DNA to plants is    sonication of target cells, which may be used herein. Alternatively,    liposome and spheroplast fusion may be used to introduce expression    vectors into plants. Direct uptake of DNA into protoplasts using    CaCl₂ precipitation, polyvinyl alcohol or poly-L-ornithine may also    be useful. Electroporation of protoplasts and whole cells and    tissues may also be utilized.

Following transformation of canola target tissues, expression of theabove-described selectable marker genes allows for preferentialselection of transformed cells, tissues and/or plants, usingregeneration and selection methods well known in the art.

The foregoing methods for transformation would typically be used forproducing a transgenic variety. The transgenic variety could then becrossed with another (non-transformed or transformed) variety in orderto produce a new transgenic variety. Alternatively, a genetic traitwhich has been engineered into a particular canola line using theforegoing transformation techniques could be moved into another lineusing traditional backcrossing techniques that are well known in theplant breeding arts. For example, a backcrossing approach could be usedto move an engineered trait from a public, non-elite variety into anelite variety, or from a variety containing a foreign gene in its genomeinto a variety or varieties which do not contain that gene. As usedherein, “crossing” can refer to a simple X by Y cross, or the process ofbackcrossing, depending on the context.

Genetic Marker Profile Through SSR and First Generation Progeny

In addition to phenotypic observations, a plant can also be identifiedby its genotype. The genotype of a plant can be characterized through agenetic marker profile which can identify plants of the same variety ora related variety or be used to determine or validate a pedigree.Genetic marker profiles can be obtained by techniques such asRestriction Fragment Length Polymorphisms (RFLPs), Randomly AmplifiedPolymorphic DNAs (RAPDs), Arbitrarily Primed Polymerase Chain Reaction(AP-PCR), DNA Amplification Fingerprinting (DAF), Sequence CharacterizedAmplified Regions (SCARs), Amplified Fragment Length Polymorphisms(AFLPs), Simple Sequence Repeats (SSRs) which are also referred to asMicrosatellites, and Single Nucleotide Polymorphisms (SNPs).

Particular markers used for these purposes are not limited to anyparticular set of markers, but are envisioned to include any type ofmarker and marker profile which provides a means of distinguishingvarieties. One method of comparison is to use only homozygous loci forSCV942568.

In addition to being used for identification of canola line SCV942568and plant parts and plant cells of line SCV942568, the genetic profilemay be used to identify a canola plant produced through the use ofSCV942568 or to verify a pedigree for progeny plants produced throughthe use of SCV942568. The genetic marker profile is also useful inbreeding and developing backcross conversions.

The present invention comprises a canola plant characterized bymolecular and physiological data obtained from the representative sampleof said variety deposited with the American Type Culture Collection(ATCC). Further provided by the invention is a canola plant formed bythe combination of the disclosed canola plant or plant cell with anothercanola plant or cell and comprising the homozygous alleles of thevariety.

Means of performing genetic marker profiles using SSR polymorphisms arewell known in the art. SSRs are genetic markers based on polymorphismsin repeated nucleotide sequences, such as microsatellites. A markersystem based on SSRs can be highly informative in linkage analysisrelative to other marker systems in that multiple alleles may bepresent. Another advantage of this type of marker is that, through useof flanking primers, detection of SSRs can be achieved, for example, bythe polymerase chain reaction (PCR), thereby eliminating the need forlabor-intensive Southern hybridization. The PCR detection is done by useof two oligonucleotide primers flanking the polymorphic segment ofrepetitive DNA. Repeated cycles of heat denaturation of the DNA followedby annealing of the primers to their complementary sequences at lowtemperatures, and extension of the annealed primers with DNA polymerase,comprise the major part of the methodology.

Following amplification, markers can be scored by electrophoresis of theamplification products. Scoring of marker genotype is based on the sizeof the amplified fragment, which may be measured by the number of basepairs of the fragment. While variation in the primer used or inlaboratory procedures can affect the reported fragment size, relativevalues should remain constant regardless of the specific primer orlaboratory used. When comparing varieties it is preferable if all SSRprofiles are performed in the same lab.

The SSR profile of canola plant SCV942568 can be used to identify plantscomprising SCV942568 as a parent, since such plants will comprise thesame homozygous alleles as SCV942568. Because the canola variety isessentially homozygous at all relevant loci, most loci should have onlyone type of allele present. In contrast, a genetic marker profile of anF₁ progeny should be the sum of those parents, e.g., if one parent washomozygous for allele x at a particular locus, and the other parenthomozygous for allele y at that locus, then the F₁ progeny will be xy(heterozygous) at that locus. Subsequent generations of progeny producedby selection and breeding are expected to be of genotype x (homozygous),y (homozygous), or xy (heterozygous) for that locus position. When theF₁ plant is selfed or sibbed for successive filial generations, thelocus should be either x or y for that position.

In addition, plants and plant parts substantially benefiting from theuse of SCV942568 in their development, such as SCV942568 comprising abackcross conversion, transgene, or genetic sterility factor, may beidentified by having a molecular marker profile with a high percentidentity to SCV942568. Such a percent identity might be 95%, 96%, 97%,98%, 99%, 99.5% or 99.9% identical to SCV942568.

The SSR profile of SCV942568 also can be used to identify essentiallyderived varieties and other progeny varieties developed from the use ofSCV942568, as well as cells and other plant parts thereof. Progenyplants and plant parts produced using SCV942568 may be identified byhaving a molecular marker profile of at least 25%, 30%, 35%, 40%, 45%,50%, 55%, 60%, 65%, 70%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%,84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%,98%, 99% or 99.5% genetic contribution from canola variety, as measuredby either percent identity or percent similarity. Such progeny may befurther characterized as being within a pedigree distance of SCV942568,such as within 1, 2, 3, 4 or 5 or less cross-pollinations to a canolaplant other than SCV942568 or a plant that has SCV942568 as aprogenitor. Unique molecular profiles may be identified with othermolecular tools such as SNPs and RFLPs.

While determining the SSR genetic marker profile of the plants describedsupra, several unique SSR profiles may also be identified which did notappear in either parent of such plant. Such unique SSR profiles mayarise during the breeding process from recombination or mutation. Acombination of several unique alleles provides a means of identifying aplant variety, an F₁ progeny produced from such variety, and progenyproduced from such variety.

Single-Gene Conversions

When the term “canola plant” is used in the context of the presentinvention, this also includes any single gene conversions of thatvariety. The term single gene converted plant as used herein refers tothose canola plants which are developed by backcrossing, whereinessentially all of the desired morphological and physiologicalcharacteristics of a variety are recovered in addition to the singlegene transferred into the variety via the backcrossing technique.Backcrossing methods can be used with the present invention to improveor introduce a characteristic into the variety. A hybrid progeny may bebackcrossed to the recurrent parent 1, 2, 3, 4, 5, 6, 7, 8 or more timesas part of this invention. The parental canola plant that contributesthe gene for the desired characteristic is termed the nonrecurrent ordonor parent. This terminology refers to the fact that the nonrecurrentparent is used one time in the backcross protocol and therefore does notrecur. The parental canola plant to which the gene or genes from thenonrecurrent parent are transferred is known as the recurrent parent asit is used for several rounds in the backcrossing protocol. In a typicalbackcross protocol, the original variety of interest (recurrent parent)is crossed to a second variety (nonrecurrent parent) that carries thesingle gene of interest to be transferred. The resulting progeny fromthis cross are then crossed again to the recurrent parent and theprocess is repeated until a canola plant is obtained wherein essentiallyall of the desired morphological and physiological characteristics ofthe recurrent parent are recovered in the converted plant, in additionto the single transferred gene from the nonrecurrent parent.

The selection of a suitable recurrent parent is an important step for asuccessful backcrossing procedure. The goal of a backcross protocol isto alter or substitute a single trait or characteristic in the originalvariety. To accomplish this, a single gene of the recurrent variety ismodified or substituted with the desired gene from the nonrecurrentparent, while retaining essentially all of the rest of the desiredgenetic, and therefore the desired physiological and morphological,constitution of the original variety. The choice of the particularnonrecurrent parent will depend on the purpose of the backcross; one ofthe major purposes is to add some agronomically important trait to theplant. The exact backcrossing protocol will depend on the characteristicor trait being altered to determine an appropriate testing protocol.Although backcrossing methods are simplified when the characteristicbeing transferred is a dominant allele, a recessive allele may also betransferred. In this instance it may be necessary to introduce a test ofthe progeny to determine if the desired characteristic has beensuccessfully transferred.

Many single gene traits have been identified that are not regularlyselected for in the development of a new variety but that can beimproved by backcrossing techniques. Single gene traits may or may notbe transgenic; examples of these traits include but are not limited to,male sterility, waxy starch, herbicide resistance, resistance forbacterial, fungal, or viral disease, insect resistance, male fertility,enhanced nutritional quality, industrial usage, yield stability andyield enhancement. These genes are generally inherited through thenucleus.

Introduction of a New Trait or Locus into SCV942568

Line SCV942568 represents a new base genetic variety into which a newlocus or trait may be introgressed. Direct transformation andbackcrossing represent two methods that can be used to accomplish suchan introgression. The term backcross conversion and single locusconversion are used interchangeably to designate the product of abackcrossing program.

Backcross Conversions of SCV942568

A backcross conversion of SCV942568 may occur when DNA sequences areintroduced through backcrossing with SCV942568 utilized as the recurrentparent. Both naturally occurring and transgenic DNA sequences may beintroduced through backcrossing techniques. Molecular marker assistedbreeding or selection may be utilized to reduce the number ofbackcrosses necessary to achieve the backcross conversion.

The complexity of the backcross conversion method depends on the type oftrait being transferred (single genes or closely linked genes as vs.unlinked genes), the level of expression of the trait, the type ofinheritance (cytoplasmic or nuclear) and the types of parents includedin the cross. It is understood by those of ordinary skill in the artthat for single gene traits that are relatively easy to classify, thebackcross method is effective and relatively easy to manage. Desiredtraits that may be transferred through backcross conversion include, butare not limited to, sterility (nuclear and cytoplasmic), fertilityrestoration, nutritional enhancements, drought tolerance, nitrogenutilization, altered fatty acid profile, altered seed amino acid levels,altered seed oil levels, low phytate, industrial enhancements, diseaseresistance (bacterial, fungal or viral), insect resistance and herbicideresistance. In addition, an introgression site itself, such as an FRTsite, Lox site or other site specific integration site, may be insertedby backcrossing and utilized for direct insertion of one or more genesof interest into a specific plant variety. In some embodiments of theinvention, the number of loci that may be backcrossed into SCV942568 isat least 1, 2, 3, 4, or 5 and/or no more than 6, 5, 4, 3, or 2. A singlelocus may contain several transgenes, such as a transgene for diseaseresistance that, in the same expression vector, also contains atransgene for herbicide resistance. The gene for herbicide resistancemay be used as a selectable marker and/or as a phenotypic trait. Asingle locus conversion of site specific integration system allows forthe integration of multiple genes at the converted loci.

The backcross conversion may result from either the transfer of adominant allele or a recessive allele. Selection of progeny containingthe trait of interest is accomplished by direct selection for a traitassociated with a dominant allele. Transgenes transferred viabackcrossing typically function as a dominant single gene trait and arerelatively easy to classify. Selection of progeny for a trait that istransferred via a recessive allele requires growing and selfing thefirst backcross generation to determine which plants carry the recessivealleles. Recessive traits may require additional progeny testing insuccessive backcross generations to determine the presence of the locusof interest. The last backcross generation is usually selfed to givepure breeding progeny for the gene(s) being transferred, although abackcross conversion with a stably introgressed trait may also bemaintained by further backcrossing to the recurrent parent withselection for the converted trait.

Along with selection for the trait of interest, progeny are selected forthe phenotype of the recurrent parent. The backcross is a form ofinbreeding, and the features of the recurrent parent are automaticallyrecovered after successive backcrosses. As noted above, the number ofbackcrosses necessary can be reduced with the use of molecular markers.Other factors, such as a genetically similar donor parent, may alsoreduce the number of backcrosses necessary. As noted, backcrossing iseasiest for simply inherited, dominant and easily recognized traits.

One process for adding or modifying a trait or locus in canola lineSCV942568 comprises crossing SCV942568 plants grown from SCV942568 seedwith plants of another canola variety that comprise the desired trait orlocus, selecting F₁ progeny plants that comprise the desired trait orlocus to produce selected F₁ progeny plants, crossing the selectedprogeny plants with the SCV942568 plants to produce backcross progenyplants, selecting for backcross progeny plants that have the desiredtrait or locus and the morphological characteristics of canola lineSCV942568 to produce selected backcross progeny plants; and backcrossingto SCV942568 three or more times in succession to produce selectedfourth or higher backcross progeny plants that comprise said trait orlocus. The modified SCV942568 may be further characterized as havingessentially all of the physiological and morphological characteristicsof canola line SCV942568 listed in Table 1 and/or may be characterizedby percent similarity or identity to SCV942568 as determined by SSRmarkers. The above method may be utilized with fewer backcrosses inappropriate situations, such as when the donor parent is highly relatedor markers are used in the selection step. Desired traits that may beused include those nucleic acids known in the art, some of which arelisted herein, that will affect traits through nucleic acid expressionor inhibition. Desired loci include the introgression of FRT, Lox andother sites for site specific integration, which may also affect adesired trait if a functional nucleic acid is inserted at theintegration site.

In addition, the above process and other similar processes describedherein may be used to produce first generation progeny canola seed byadding a step at the end of the process that comprises crossingSCV942568 with the introgressed trait or locus with a different canolaplant and harvesting the resultant first generation progeny canola seed.

Tissue Culture of Canola

Further production of the SCV942568 line can occur by tissue culture andregeneration. Culture of various tissues of canola and regeneration ofplants therefrom is known and widely published. Thus, another aspect ofthis invention is to provide cells which upon growth and differentiationproduce canola plants having the physiological and morphologicalcharacteristics of canola line SCV942568.

As used herein, the term “tissue culture” indicates a compositioncomprising isolated cells of the same or a different type or acollection of such cells organized into parts of a plant. Exemplarytypes of tissue cultures are protoplasts, calli, plant clumps, and plantcells that can generate tissue culture that are intact in plants orparts of plants, such as embryos, pollen, flowers, seeds, pods, leaves,stems, roots, root tips, anthers, pistils and the like. Means forpreparing and maintaining plant tissue culture are well known in theart. Tissue culture comprising organs can be used in the presentinvention to produce regenerated plants.

Using SCV942568 to Develop Other Canola Varieties

Canola varieties such as SCV942568 are typically developed for use inseed and grain production. However, canola varieties such as SCV942568also provide a source of breeding material that may be used to developnew canola varieties. Plant breeding techniques known in the art andused in a canola plant breeding program include, but are not limited to,recurrent selection, mass selection, bulk selection, mass selection,backcrossing, pedigree breeding, open pollination breeding, restrictionfragment length polymorphism enhanced selection, genetic marker enhancedselection, making double haploids, and transformation. Oftencombinations of these techniques are used. The development of canolavarieties in a plant breeding program requires, in general, thedevelopment and evaluation of homozygous varieties.

Additional Breeding Methods

This invention is directed to methods for producing a canola plant bycrossing a first parent canola plant with a second parent canola plantwherein either the first or second parent canola plant is lineSCV942568. The other parent may be any other canola plant, such as acanola plant that is part of a synthetic or natural population. Any suchmethods using canola line SCV942568 are part of this invention: selfing,sibbing, backcrosses, mass selection, pedigree breeding, bulk selection,hybrid production, crosses to populations, and the like. These methodsare well known in the art and some of the more commonly used breedingmethods are described below.

The following describes breeding methods that may be used with canolaline SCV942568 in the development of further canola plants. One suchembodiment is a method for developing a line SCV942568 progeny canolaplant in a canola plant breeding program comprising: obtaining thecanola plant, or a part thereof, of line SCV942568 utilizing said plantor plant part as a source of breeding material and selecting a canolaline SCV942568 progeny plant with molecular markers in common with lineSCV942568 and/or with morphological and/or physiological characteristicsselected from the characteristics listed in Table 1. Breeding steps thatmay be used in the canola plant breeding program include pedigreebreeding, backcrossing, mutation breeding, and recurrent selection. Inconjunction with these steps, techniques such as RFLP-enhancedselection, genetic marker enhanced selection (for example SSR markers)and the making of double haploids may be utilized.

Another method involves producing a population of canola line SCV942568progeny canola plants, comprising crossing line SCV942568 with anothercanola plant, thereby producing a population of canola plants, which, onaverage, derive 50% of their alleles from canola line SCV942568. A plantof this population may be selected and repeatedly selfed or sibbed witha canola line resulting from these successive filial generations. Oneembodiment of this invention is the canola line produced by this methodand that has obtained at least 50% of its alleles from canola lineSCV942568.

One of ordinary skill in the art of plant breeding would know how toevaluate the traits of two plant varieties to determine if there is nosignificant difference between the two traits expressed by thosevarieties. Thus the invention includes canola line SCV942568 progenycanola plants comprising a combination of at least two line SCV942568traits selected from the group consisting of those listed in Table 1 orthe line SCV942568 combination of traits listed in the Summary of theInvention, so that said progeny canola plant is not significantlydifferent for said traits than canola line SCV942568 as determined atthe 5% significance level when grown in the same environmentalconditions. Using techniques described herein, molecular markers may beused to identify said progeny plant as a canola line SCV942568 progenyplant. Mean trait values may be used to determine whether traitdifferences are significant, and preferably the traits are measured onplants grown under the same environmental conditions. Once such avariety is developed its value is substantial since it is important toadvance the germplasm base as a whole in order to maintain or improvetraits such as yield, disease resistance, pest resistance, and plantperformance in extreme environmental conditions.

Progeny of canola line SCV942568 may also be characterized through theirfilial relationship with canola line SCV942568, as for example, beingwithin a certain number of breeding crosses of canola line SCV942568. Abreeding cross is a cross made to introduce new genetics into theprogeny, and is distinguished from a cross, such as a self or a sibcross, made to select among existing genetic alleles. The lower thenumber of breeding crosses in the pedigree, the closer the relationshipbetween canola line SCV942568 and its progeny. For example, progenyproduced by the methods described herein may be within 1, 2, 3, 4 or 5breeding crosses of canola line SCV942568.

As used herein, the term “plant” includes plant cells, plantprotoplasts, plant cell tissue cultures from which canola plants can beregenerated, plant calli, plant clumps, and plant cells that are intactin plants or parts of plants, such as embryos, pollen, ovules, flowers,pods, leaves, roots, root tips, anthers, cotyledons, hypocotyls,meristematic cells, stems, pistils, petiole, and the like.

Pedigree Breeding

Pedigree breeding starts with the crossing of two genotypes, such asSCV942568 and another canola variety having one or more desirablecharacteristics that is lacking or which complements SCV942568. If thetwo original parents do not provide all the desired characteristics,other sources can be included in the breeding population. In thepedigree method, superior plants are selfed and selected in successivefilial generations. In the succeeding filial generations theheterozygous condition gives way to homogeneous varieties as a result ofself-pollination and selection. Typically in the pedigree method ofbreeding, five or more successive filial generations of selfing andselection is practiced: F₁ to F₂; F₂ to F₃; F₃ to F₄; F₄ to F₅, etc.After a sufficient amount of inbreeding, successive filial generationswill serve to increase seed of the developed variety. Preferably, thedeveloped variety comprises homozygous alleles at about 95% or more ofits loci.

In addition to being used to create a backcross conversion, backcrossingcan also be used in combination with pedigree breeding. As discussedpreviously, backcrossing can be used to transfer one or morespecifically desirable traits from one variety, the donor parent, to adeveloped variety called the recurrent parent, which has overall goodagronomic characteristics yet lacks that desirable trait or traits.However, the same procedure can be used to move the progeny toward thegenotype of the recurrent parent but at the same time retain manycomponents of the non-recurrent parent by stopping the backcrossing atan early stage and proceeding with selfing and selection. For example, acanola variety may be crossed with another variety to produce a firstgeneration progeny plant. The first generation progeny plant may then bebackcrossed to one of its parent varieties to create a BC1 or BC2.Progeny are selfed and selected so that the newly developed variety hasmany of the attributes of the recurrent parent and yet several of thedesired attributes of the non-recurrent parent. This approach leveragesthe value and strengths of the recurrent parent for use in new canolavarieties.

Therefore, an embodiment of this invention is a method of making abackcross conversion of canola line SCV942568, comprising the steps ofcrossing a plant of canola line SCV942568 with a donor plant comprisinga desired trait, selecting an F₁ progeny plant comprising the desiredtrait, and backcrossing the selected F₁ progeny plant to a plant ofcanola line SCV942568. This method may further comprise the step ofobtaining a molecular marker profile of canola line SCV942568 and usingthe molecular marker profile to select for a progeny plant with thedesired trait and the molecular marker profile of SCV942568. In oneembodiment the desired trait is a mutant gene or transgene present inthe donor parent.

Recurrent Selection and Mass Selection

Recurrent selection is a method used in a plant breeding program toimprove a population of plants. SCV942568 is suitable for use in arecurrent selection program. The method entails individual plants crosspollinating with each other to form progeny. The progeny are grown andthe superior progeny selected by any number of selection methods, whichinclude individual plant, half-sib progeny, full-sib progeny and selfedprogeny. The selected progeny are cross pollinated with each other toform progeny for another population. This population is planted andagain superior plants are selected to cross pollinate with each other.Recurrent selection is a cyclical process and therefore can be repeatedas many times as desired. The objective of recurrent selection is toimprove the traits of a population. The improved population can then beused as a source of breeding material to obtain new varieties forcommercial or breeding use, including the production of a syntheticline. A synthetic line is the resultant progeny formed by theintercrossing of several selected varieties.

Mass selection is a useful technique when used in conjunction withmolecular marker enhanced selection. In mass selection seeds fromindividuals are selected based on phenotype or genotype. These selectedseeds are then bulked and used to grow the next generation. Bulkselection requires growing a population of plants in a bulk plot,allowing the plants to self-pollinate, harvesting the seed in bulk andthen using a sample of the seed harvested in bulk to plant the nextgeneration. Also, instead of self pollination, directed pollinationcould be used as part of the breeding program.

Mutation Breeding

Mutation breeding is another method of introducing new traits intocanola line SCV942568. Mutations that occur spontaneously or areartificially induced can be useful sources of variability for a plantbreeder. The goal of artificial mutagenesis is to increase the rate ofmutation for a desired characteristic. Mutation rates can be increasedby many different means including temperature, long-term seed storage,tissue culture conditions, radiation; such as X-rays, Gamma rays (e.g.cobalt 60 or cesium 137), neutrons, (product of nuclear fission byuranium 235 in an atomic reactor), Beta radiation (emitted fromradioisotopes such as phosphorus 32 or carbon 14), or ultravioletradiation (preferably from 2500 to 2900 nm), or chemical mutagens (suchas base analogues (5-bromo-uracil), related compounds (8-ethoxycaffeine), antibiotics (streptonigrin), alkylating agents (sulfurmustards, nitrogen mustards, epoxides, ethylenamines, sulfates,sulfonates, sulfones, lactones), azide, hydroxylamine, nitrous acid, oracridines. Once a desired trait is observed through mutagenesis thetrait may then be incorporated into existing germplasm by traditionalbreeding techniques. In addition, mutations created in other canolaplants may be used to produce a backcross conversion of canola lineSCV942568 that comprises such mutation.

Breeding with Molecular Markers

Molecular markers, which include markers identified through the use oftechniques such as Isozyme Electrophoresis, Restriction Fragment LengthPolymorphisms (RFLPs), Randomly Amplified Polymorphic DNAs (RAPDs),Arbitrarily Primed Polymerase Chain Reaction (AP-PCR), DNA AmplificationFingerprinting (DAF), Sequence Characterized Amplified Regions (SCARs),Amplified Fragment Length Polymorphisms (AFLPs), Simple Sequence Repeats(SSRs) and Single Nucleotide Polymorphisms (SNPs), may be used in plantbreeding methods utilizing canola line SCV942568. One use of molecularmarkers is Quantitative Trait Loci (QTL) mapping. QTL mapping is the useof markers, which are known to be closely linked to alleles that havemeasurable effects on a quantitative trait. Selection in the breedingprocess is based upon the accumulation of markers linked to the positiveeffecting alleles and/or the elimination of the markers linked to thenegative effecting alleles from the plant's genome.

Molecular markers can also be used during the breeding process for theselection of qualitative traits. For example, markers closely linked toalleles or markers containing sequences within the actual alleles ofinterest can be used to select plants that contain the alleles ofinterest during a backcrossing breeding program. The markers can also beused to select for the genome of the recurrent parent and against thegenome of the donor parent. Using this procedure can minimize the amountof genome from the donor parent that remains in the selected plants. Itcan also be used to reduce the number of crosses back to the recurrentparent needed in a backcrossing program. The use of molecular markers inthe selection process is often called genetic marker enhanced selection.Molecular markers may also be used to identify and exclude certainsources of germplasm as parental varieties or ancestors of a plant byproviding a means of tracking genetic profiles through crosses.

Production of Double Haploids

The production of double haploids can also be used for the developmentof plants with a homozygous phenotype in the breeding program. Forexample, a canola plant for which canola line SCV942568 is a parent canbe used to produce double haploid plants. Double haploids are producedby the doubling of a set of chromosomes (1 N) from a heterozygous plantto produce a completely homozygous individual. This can be advantageousbecause the process omits the generations of selfing needed to obtain ahomozygous plant from a heterozygous source.

Haploid induction systems have been developed for various plants toproduce haploid tissues, plants and seeds. Thus, an embodiment of thisinvention is a process for making a substantially homozygous SCV942568progeny plant by producing or obtaining a seed from the cross ofSCV942568 and another canola plant and applying double haploid methodsto the F₁ seed or F₁ plant or to any successive filial generation. Basedon studies in maize and currently being conducted in canola, suchmethods would decrease the number of generations required to produce avariety with similar genetics or characteristics to SCV942568.

In particular, a process of making seed retaining the molecular markerprofile of canola line SCV942568 is contemplated, such processcomprising obtaining or producing F₁ seed for which canola lineSCV942568 is a parent, inducing doubled haploids to create progenywithout the occurrence of meiotic segregation, obtaining the molecularmarker profile of canola line SCV942568, and selecting progeny thatretain the molecular marker profile of SCV942568.

A pollination control system and effective transfer of pollen from oneparent to the other offers improved plant breeding and an effectivemethod for producing hybrid canola seed and plants. For example, theogura cytoplasmic male sterility (cms) system, developed via protoplastfusion between radish (Raphanus sativus) and rapeseed (Brassica napus)is one of the most frequently used methods of hybrid production. Itprovides stable expression of the male sterility trait and an effectivenuclear restorer gene.

In developing improved new Brassica hybrid varieties, breeders useself-incompatible (SI), cytoplasmic male sterile (CMS) and nuclear malesterile (NMS) Brassica plants as the female parent. In using theseplants, breeders are attempting to improve the efficiency of seedproduction and the quality of the F₁ hybrids and to reduce the breedingcosts. When hybridization is conducted without using SI, CMS or NMSplants, it is more difficult to obtain and isolate the desired traits inthe progeny (F₁ generation) because the parents are capable ofundergoing both cross-pollination and self-pollination. If one of theparents is a SI, CMS or NMS plant that is incapable of producing pollen,only cross pollination will occur. By eliminating the pollen of oneparental variety in a cross, a plant breeder is assured of obtaininghybrid seed of uniform quality, provided that the parents are of uniformquality and the breeder conducts a single cross.

In one instance, production of F₁ hybrids includes crossing a CMSBrassica female parent, with a pollen producing male Brassica parent. Toreproduce effectively, however, the male parent of the F₁ hybrid musthave a fertility restorer gene (Rf gene). The presence of an Rf genemeans that the F₁ generation will not be completely or partiallysterile, so that either self-pollination or cross pollination may occur.Self pollination of the F₁ generation to produce several subsequentgenerations is important to ensure that a desired trait is heritable andstable and that a new variety has been isolated.

An example of a Brassica plant which is cytoplasmic male sterile andused for breeding is ogura (OGU) cytoplasmic male sterile. A fertilityrestorer for ogura cytoplasmic male sterile plants has been transferredfrom Raphanus sativus (radish) to Brassica. The restorer gene is Rf1,originating from radish. Improved versions of this restorer have beendeveloped as well. Other sources and refinements of CMS sterility incanola include the Polima cytoplasmic male sterile plant.

Further, as a result of the advances in sterility systems, lines aredeveloped that can be used as an open pollinated variety (ie. a purelineline sold to the grower for planting) and/or as a sterile inbred(female) used in the production of F₁ hybrid seed. In the latter case,favorable combining ability with a restorer (male) would be desirable.The resulting hybrid seed would then be sold to the grower for planting.

The development of a canola hybrid in a canola plant breeding programinvolves three steps: (1) the selection of plants from various germplasmpools for initial breeding crosses; (2) the selfing of the selectedplants from the breeding crosses for several generations to produce aseries of inbred lines, which, although different from each other, breedtrue and are highly uniform; and (3) crossing the selected inbred lineswith different inbred lines to produce the hybrids. During theinbreeding process in canola, the vigor of the lines decreases. Vigor isrestored when two different inbred lines are crossed to produce thehybrid. An important consequence of the homozygosity and homogeneity ofthe inbred lines is that the hybrid between a defined pair of inbredswill always be the same. Once the inbreds that give a superior hybridhave been identified, the hybrid seed can be reproduced indefinitely aslong as the homogeneity of the inbred parents is maintained.

Combining ability of a line, as well as the performance of the line perse, is a factor in the selection of improved canola lines that may beused as inbreds. Combining ability refers to a line's contribution as aparent when crossed with other lines to form hybrids. The hybrids formedfor the purpose of selecting superior lines are designated test crosses.One way of measuring combining ability is by using breeding values.Breeding values are based on the overall mean of a number of testcrosses. This mean is then adjusted to remove environmental effects andit is adjusted for known genetic relationships among the lines.

Hybrid seed production requires inactivation of pollen produced by thefemale parent. Incomplete inactivation of the pollen provides thepotential for self-pollination. This inadvertently self-pollinated seedmay be unintentionally harvested and packaged with hybrid seed.Similarly, because the male parent is grown next to the female parent inthe field there is also the potential that the male selfed seed could beunintentionally harvested and packaged with the hybrid seed. Once theseed from the hybrid bag is planted, it is possible to identify andselect these self-pollinated plants. These self-pollinated plants willbe genetically equivalent to one of the inbred lines used to produce thehybrid. Though the possibility of inbreds being included in hybrid seedbags exists, the occurrence is rare because much care is taken to avoidsuch inclusions. These self-pollinated plants can be identified andselected by one skilled in the art, either through visual or molecularmethods.

Brassica napus canola plants, absent the use of sterility systems, arerecognized to commonly be self-fertile with approximately 70 to 90percent of the seed normally forming as the result of self-pollination.The percentage of cross pollination may be further enhanced whenpopulations of recognized insect pollinators at a given growing site aregreater. Thus open pollination is often used in commercial canolaproduction.

Industrial Uses

Currently Brassica napus canola is recognized as an increasinglyimportant oilseed crop and a source of meal in many parts of the world.The oil as removed from the seeds commonly contains a lesserconcentration of endogenously formed saturated fatty acids than othervegetable oils and is well suited for use in the production of salad oilor other food products or in cooking or frying applications. The oilalso finds utility in industrial applications. Additionally, the mealcomponent of the seeds can be used as a nutritious protein concentratefor livestock.

Canola oil has the lowest level of saturated fatty acids of allvegetable oils. “Canola” refers to rapeseed (Brassica) which has aerucic acid (C_(22:1)) content of at most 2 percent by weight based onthe total fatty acid content of a seed, and which produces, aftercrushing, an air-dried meal containing less than 30 micromoles (μmol)per gram of defatted (oil-free) meal. These types of rapeseed aredistinguished by their edibility in comparison to more traditionalvarieties of the species.

Canola line SCV942568 can be used in the production of an ediblevegetable oil or other food products in accordance with knowntechniques. The solid meal component derived from seeds can be used as anutritious livestock feed. Parts of the plant not used for human oranimal food can be used for biofuel.

Tables

In Table 2, selected oil quality characteristics of the seed of canolaline SCV942568 are compared with oil quality characteristics of the sametwo canola lines referenced in Table 1. The data in Table 2 includesresults on seed samples collected from two testing locations and arepresented as averages of the values observed. Column 1 shows thevariety, column 2 shows the percent saturated fatty acid content, column3 shows the percent oleic acid content, column 4 shows the percentlinoleic content and column 5 shows the percent linolenic content.

TABLE 2 Oil Quality Characteristics of SCV942568 Compared to TwoProprietary Canola Lines 1 2 4 5 Vari- % Sat. 3 % Lino- % Lino- ety Fat.Acid % Oleic Acid leic lenic SCV942568 7.12 65.19 17.94 7.69 SCV8167966.75 65.00 17.71 8.62 SCV431322 7.19 65.75 16.95 8.10

Compared to the two proprietary canola lines SCV816796 and SCV431322,the averages presented in Table 2 indicate that seed of canola lineSCV942568 of the present invention has a percent saturated fatty acidcontent that is between the comparative lines, a percent oleic acidcontent that is between, and a percent linoleic acid that is greater,and a percent linolenic acid content that is less than the comparativecanola lines.

In Table 3, selected characteristics of a single cross hybrid (G98689)containing canola line SCV942568 are compared with characteristics oftwo commercial canola lines. The comparisons in Table 3 show the valuesfor G98689 and the average of the two commercial canola lines, 46A65 andQ2, with the values shown being representative of data collected from avarying number of trial locations (“No. Locs.”). Column 1 shows thevariety, column 2 shows the yield expressed as a percent of the checkmean, column 3 shows the plant lodging ratings, column 4 shows the daysto maturity, column 5 shows percent saturated fatty acid content withinthe oil, column 6 shows the plant height data, column 7 shows theglucosinolate content in micromoles per gram, column 8 shows the percentoil content within the seed, column 9 shows the percent protein contentwith the oil-free meal, column 10 shows the resistance rating toblackleg disease and column 11 shows the resistance rating to fusariumwilt disease.

TABLE 3 Characteristics of a Hybrid Containing SCV942568 Compared to TwoCommercial Varieties* 3 4 6 7 10 11 1 2 Lodging DMat 5 Height Gluc 8 9BL FW Variety Yield % rating Days Sats % cm μm/g Oil % Prot % ratingrating 46A65 103.7 2.4 100.5 6.55 108.8 12.30 47.02 46.19 R R Q2 96.32.7 101.0 6.79 108.6 10.90 46.20 46.06 R R Avg. of 100.0 2.6 100.7 6.7108.7 11.6 46.6 46.1 R R Checks G08039 136.2 1.9 102.8 6.73 120 9.9349.07 46.79 R R No. 18 10 15 13 16 13 13 13 5 3 Locs. *Hybrid G08039compared to commercial varieties 46A65 and Q2. Note: 46A65 and Q2 areused as check varieties in the official Canadian variety registrationtrials conducted by the Western Canada Canola/Rapeseed RecommendingCommittee, Inc. Data shown for each variety and characteristic are themean values over all zones and years tested.

Compared to the average of the values recorded for 46A65 and Q2, thehybrid (G08039) containing SCV942568 of the present invention has higheryield, a lodging rating that is less, a days to maturity rating that isgreater, a similar percent saturated fat content, a taller plant height,a significantly lower percent glucosinolate content, a higher percentoil content, a percent protein content that is the same and comparableresistance to blackleg and fusarium wilt.

Deposit Information

A deposit of the proprietary canola line designated SCV942568 disclosedabove and recited in the appended claims has been made with the AmericanType Culture Collection (ATCC), 10801 University Boulevard, Manassas,Va. 20110. The date of deposit was Jun. 14, 2012. The deposit of 2,500seeds was taken from the same deposit maintained by Applicant sinceprior to the filing date of this application. All restrictions upon thedeposit have been irrevocably removed, and the deposit is intended tomeet all of the requirements of 37 C.F.R. 1.801-1.809. The ATCCaccession number is PTA-12938. The deposit will be maintained in thedepository for a period of 30 years, or 5years after the last request,or for the enforceable life of the patent, whichever is longer, and willbe replaced as necessary during that period.

While a number of exemplary aspects and embodiments have been discussedabove, those of skill in the art will recognize certain modifications,permutations, additions and sub-combinations thereof. It is thereforeintended that the following appended claims and claims hereafterintroduced are interpreted to include all such modifications,permutations, additions and sub-combinations as are within their truespirit and scope.

What is claimed is:
 1. A seed of canola line SCV942568, representative sample of seed of which was deposited under ATCC Accession No. PTA-12938.
 2. A canola plant, or a part thereof, produced by growing the seed of claim
 1. 3. A tissue culture produced from protoplasts or cells from the plant of claim 2, wherein said cells or protoplasts of the tissue culture are produced from a plant part selected from the group consisting of leaf, pollen, embryo, cotyledon, hypocotyl, meristematic cell, root, root tip, anther, pistil, flower, shoot, stem, petiole and pod.
 4. A canola plant regenerated from the tissue culture of claim 3, wherein the plant has essentially all of the morphological and physiological characteristics of line SCV942568 as shown in Table
 1. 5. A composition comprising a seed or plant part of canola line SCV942568, and a cultivation medium, wherein a representative sample of seed of canola line SCV942568 has been deposited under ATCC Accession No, PTA-12938.
 6. The seed or plant part of claim 5, wherein the cultivation medium is soil or a synthetic medium.
 7. A canola seed produced by crossing two canola plants and harvesting the resultant canola seed, wherein at least one canola plant is the canola plant of claim
 2. 8. A canola plant, or a part thereof, produced by growing said seed of claim
 7. 9. A method of producing a male sterile canola plant wherein the method comprises crossing the canola plant of claim 2 with a male sterile canola plant and harvesting the resultant seed.
 10. A male sterile canola plant produced by transforming the canola plant of claim 2 with a nucleic acid molecule that confers male sterility.
 11. An herbicide resistant canola plant produced by transforming the canola plant of claim 2 with a transgene that confers herbicide resistance to an herbicide selected from the group consisting of imidazolinone, sulfonylurea, glyphosate, glufosinate, 2,4-D, Dicamba, L-phosphinothricin, triazine, hydroxyphenylpyruvate dioxygenase inhibitor, protoporphyrinogen oxidase inhibitor, phenoxy proprionic acid, cyclohexone and benzonitrile.
 12. An insect or pest resistant canola plant produced by transforming the canola plant of claim 2 with a transgene that confers insect or pest resistance.
 13. The canola plant of claim 12, wherein the transgene encodes a Bacillus thuringiensis endotoxin.
 14. A disease resistant canola plant produced by transforming the canola plant of claim 2 with a transgene that confers disease resistance.
 15. A canola plant having modified fatty acid metabolism or modified carbohydrate metabolism produced by transforming the canola plant of claim 2 with a transgene encoding a protein selected from the group consisting of fructosyltransferase, levansucrase, alpha-amylase, invertase and starch branching enzyme or encoding an antisense of stearyl-ACP desaturase.
 16. An industrial product produced from the seed of claim 1 wherein the industrial product is selected from the group consisting of canola meal and livestock feed.
 17. A method of introducing a desired trait into canola line SCV942568 wherein the method comprises: (a) crossing a SCV942568 plant, wherein a representative sample of seed was deposited under ATCC Accession No. PTA-12938, with a plant of another canola line that comprises a desired trait to produce progeny plants, wherein the desired trait is selected from the group consisting of male sterility, herbicide resistance, insect resistance, pest resistance, modified fatty acid metabolism, modified carbohydrate metabolism, modified seed yield, modified oil percent, modified protein percent, modified lodging resistance and resistance to bacterial disease, fungal disease or viral disease; (b) selecting one or more progeny plants that have the desired trait to produce selected progeny plants; (c) crossing the selected progeny plants with the SCV942568 plants to produce backcross progeny plants; (d) selecting for backcross progeny plants that have the desired trait and essentially all of the physiological and morphological characteristics of canola line SCV942568 listed in Table 1; and (e) repeating steps (c) and (d) two or more times to produce selected third or higher backcross progeny plants that comprise the desired trait and essentially all of the physiological and morphological characteristics of canola line SCV942568 as shown in Table
 1. 18. A canola plant produced by the method of claim 17, wherein the plant has the desired trait.
 19. The canola plant of claim 18, wherein the desired trait is herbicide resistance and the resistance is conferred to an herbicide selected from the group consisting of imidazolinone, sulfonylurea, glyphosate, glufosinate, 2,4-D, Dicamba, L-phosphinothricin, triazine, hydroxyphenylpyruvate dioxygenase inhibitor, protoporphyrinogen oxidase inhibitor, phenoxy proprionic acid, cyclohexone and benzonitrile.
 20. The canola plant of claim 18, wherein the desired trait is insect resistance and the insect resistance is conferred by a transgene encoding a Bacillus thuringiensis endotoxin.
 21. The canola plant of claim 18, wherein the desired trait is modified fatty acid metabolism or modified carbohydrate metabolism and said desired trait is conferred by a nucleic acid encoding a protein selected from the group consisting of phytase, fructosyltransferase, levansucrase, a-amylase, invertase and starch branching enzyme or encoding an antisense of stearyl-ACP desaturase.
 22. An industrial product wherein the industrial product is a protein concentrate comprising the canola meal of claim
 16. 23. An industrial product comprising the seed of claim
 1. 